Today is a great day. SWScale is no longer the default resizing library included with the core. Instead the much more accurate zimg library is now the default. This means a few new resize algorithms are available and there are many new options. The change has been made to break as few scripts as possible but there is one important difference, since YUV has so many different variants, the matrix to use always has to be specified when converting to YUV and it also sometimes has to be specified when converting from YUV.